Signal device for auto tires



E. B. DURNEY AND C, v. MASTER. SIGNAL DEVICE FOB AUTO TIRES.

APPLICATION FILED MAY I8. I920.

Patented Apr. 4, 1922.

INI/.ENTOK R215 fer 1711702 e j GV Eff.

ATTORNEY.

rires eee` EUG-ENE B. DURNEY D CHARLES V. RESTEB, 0F SELVERBELL, ARIZGNA.

SIGNAL DEVICE EUR, AUT TIRES.

Specification of Letters Patent.

Patented Apr.. d.

Application filed May 18, 1920. Serial No. 382,286.

To all whom t may concern.'

Be it known that we. EUGENE ll. DURNEY and CHARLES V. Rnrsrnn, citizens ot the United States, residing at Silverbell. in the county of Pinel and State of Arizona, have invented certain new and usetul lmprovements in a Signal Device for Auto Ylires; and we do hereby declare the following to be a full, clear7 and exact description of the invention, such as will venable others skilled in the art to which it appertains to malte and use the same.

This invention relates to signal devices adapted to be applied to automobile tires and it consists in the novel features hereinafterl described and claimed.

An object of the invention is to provide a device of the character stated which is of simple and durable structure and adapted to be applied to the nipple ot' a tire and which will give forth an audible signal in the event that the valve which is located in the nipple should leak and permit the air to escape from the tire.

lllith the above object in View., the device comprises a barrel adapted to he connected with the nipple of the tire and having a pis` ton slidably mounted therein with means for limiting' the sliding' movement ot the piston. The barrel is provided at its side with a by-pass and the piston, when not subjected to the air pressure from the interior of the tire, is forced by means of a spring which is located in the barrel to a position between the ends of the ley-pass whereby the air from the tire may pass around the piston. A whistle is mounted upon the barrel` and the air which passes around the piston and through the bypass., passes through the Whistle and causes the same to give forth an audible sound. A means is provided for regulating the tension ot the spring whereby it will move the piston when the air pres sure against the same is reduced to a degree and which is over-come by the tension of the spring. A cap is mounted upon the barn rel and is provided with openings through which the sound may travel from the Whistle.

ln the accompanying drawing:

Figure 1 is a vertical sectional View et the signal.

Fig. 2 is a sectional View taken on 2-2 ot Fig. l.

liig. 3 is similar view taken on the lne 3MB ot l@ the ends ot' the valve nipple 5 is adapted to be screwed there being a tacking washer 6 interposed between the. lower surface ot' Athe shoulder 4 and the shoulder 7 upon the the nipple. rll`he nipple o carries a springv pressed valve 8 of usual suction and the nipple passes through the rim of the wheel and communicates at its outer end with the interior ot' the tire in the usual manner. The shoulder .portion 4 is provided with a centrally located passageway 9 which receives the end of the stem otl the valve 8 and a stop block 10 is disposed transversely across the upper end ot the passage way 9. The block 10 is provided with flattened sides 10 and with curved ends 10 which are threaded for engagement with a thread in the shoulder' portion 4 whereby the said block is held in position in the said portion. fi rod 11 passes through the stop block l() and is secured thereto and the lower end of the rod 11 is adapted to engage the upper end of the stem of the valve 8 when the nipple 5 is connected with the shoulder portion l whereby the valve 8 is moved away. .l piston l2 is slidably mounted in the section 2 of the barrel and carries at its lower side a centrally positioned sleeve 13 which is adapted to receive the upper portion of the rod l1 and the lower end of the sleeve 13 may engage the Stop block 10 thus limiting the movement of the piston l2 in one di rection. rlhe section 2 is provided at its side with a ley-pass passage Way 14;- and the pis ton 12 may move trom a point beyond the ends of the ley-pass il; to a point between the ends thereof. A Ybloeit l5 is screw threadedin the upper end ot section 2 and may be provided at its side with a series ot graduations i6 which will indicate the extent to which the lower portion ot the bloclr 15 inserted in section Q9. A coil spring 7 is interposed between the lower sur-tace of' the block 15 and the opper sur- :taee of the piston i2 and under tension lll@ with a tendency to normally hold the pia ton 12 at a` polnt between the ends of the by- )ass 14. i

rlhe bloek 15 is provided with a duct 1'8 which passes vertically through the .same and which communicates at its upper end with a socket 19 provided in the upper portion of the block. A Whistle 2O is inserted in the socket 19` and its lip 21 is located di.- rectly opposite the upper end ot the duet 18. A cap 22 is adapted to be cscrewed upon the upper portion of the block 15 whereby the Whistle 20 is enclosed and the cap is provided at its side with a series of openings 23 through which the sound from the whistle may pass when it is sounded.

The operation of the device is; as follows: When the barrel is applied to the nipple of the valve the lower end of the rod 11 comes in contact with the stemof the valve in the nipple and moves the valve to an open position in the nipple therefor the air from the tire may pass through the nipple 5, the passage Way 9 and impinge again the under Side of the piston 12 andmoves the piston to a point beyond the upper end ot the bypass 14 whereby the springv 1T ronipressed between the piston and the bloek 13. The

. piston 12 remains at this position 3o long as the air pressure in the tire remains at norm mal. In the event that the tire should become unctured or a leak should oeeur at the va ve the pressure inthe tire is reduced and under the tension ot' the spring' 17 the piston 12 is moved to a position between the ends of the by-pass 14 whereby the air from the tire and which is VWithin the section 2 of the barrel passes through the by-pass 14 and enters'the. section 2 at a point above the upper surface of the piston 12. This air passes through the duet 18 and sounds the Whistle 20 by being split at the lip 21 thereof. The sound from the whistle passes out through the openings oit the oap 22 and @einem consequently one who is in the vicinity of 'the device is warned that a leak is incurring in the tire. lt is apparent that by adjust# ing the blot-ir 15 in the section 2 of the barrel and by noting the graduations 16 the tension of the spring 17 may be increased or diminished to a cert-ain predetermined degree whereby the pist-on 12 may act promptly upon being relieved of its support ot a column of air or may be retarded in its movement or varying upon the degree of tension to which the spring 17 is adjusted.

From the foregoingdescription taken in conjunction with the accompanyingr drawinlg,r it will be seen that a signal device, adapted to be applied to the nipple of 'an automobile tire and a simple and durable structure is provided and that the same may be used to advantage for giving a Warning or signal when a leali occurs in a tire.

Having thus described our invention, what We claim is A tire valve alarm deviee-comprising a casing, a block therein threaded to the valve stem, a stud to hold the valve stem open having an enlargement threaded to said block above the valve stem, said enlargement being eut away to permit escape of air through the valve, a pin on the stud extending above said blocks, a piston movably mounted on the stud to normally prevent escape of air, a'n'alarm, a spring to urge movement of the piston upon decrease of air preesure and means whereby air may by-pass 'the piston under the latter condition to eooperate with. the alarm.

In testimony whereof We aihr; tures in presence of two witnesses.

EUGENE B. DURNEY. CHARLES V. HEISTER. Witnesses Flinn Bom, ll. D. S'r. Louis.

our signa- 

